Mechanical movement



June 24, 1930.v c. E. NELSON 1,766,798

1 MECHANICAL MOVEMENT Filed Dec. 19, 1928' 2 Sheets-Sheet 1 `June 24,1930. l c. E. NELSON 1,755,798

MECHANICAL MOVEMENT Filed Dec. 19, 1928 2 Sheets-Sheet 2 u) t Y Q IHIHI[Ulli IIIIUII Q 1mm@ up lllllllllllvlllllll A HHH! lllllllll IIIHIM] Il.J I

I IH IIHIIIIIUB lll l j' 6.1?.72915071/ R @www #Litern/els Patented June24, 193i) rar MECHANCAL llOVEMEN T vApplication filed December 19, 1928.SerialNo. 327,070.

My invention is a mechanical movement utilizing a. combination system ofgears and rocking levers with links to transmit motion from a primemover to the power takeoff.

in object of my invention is utilizing first a. train of simple gearswhich receive power `'i'oin a prime mover such as a motor. The last gearof this train has a crank connected thereto and this crank drives apivoted lever through the medium of a link. This lever is formed in theshape of a bell crank and at its short end has another link connectedthereto and which second link drives the crank of another This lattergear meshes with i5 driven therefrom and this latter gear i connected toanother bell crank system hav-` ing a link connected to a crank. Thesecond lz-ell crank drives a power takeoff gear through the medium of alink connected to the small so end of the second bell crank and to thecrank on the takeoffl gear.

Another object of my invention is the construction of mechanicalmovement having the gear trains and oscillating bell cranks with thelinks arranged in multiples. For instance, I may arrange the systemhaving four gears in parallel and four bell cranks with their linksconnected to the gears. This allows the connection at the links to the'gears 30 at one quarter circle apart.

My invention is illustrated in the accompanying drawings, in which;

Figure 1 is a side elevation taken in the direction of the arrow 1 ofFig. 2;

Fig. 2 is plan o-f my invention taken in the direction of the arrow 2 ofFig. 1.

In constructing my invention I utilize a suitable base support 11 onwhich is mounted Y an electric motor 12. This motor has a pinion 40 13on its shaft which drives an idler gear 14, such gear being on the shaft15 mounted in journals 1G supported from the base. The gear 14 operatesa driven gear 17 mounted on transverse shaft. Such shaft is mounted insuitable journals 19 supported on the base. The shaft 18 carries a flywheel 20. This shaft has a plurality of first drive gears 21, therebeingl four such gears illustrated and these mesh with a first set ofdriven gears 22. These latter gears are mounted in stub shafts 23 eachstub shaft being supported in a separate journal 24.

Each of the gears 22 has al crank 25 connected thereto and from eachcrank there is a link 26 pivotally connected to the crank. Each link isconnected to a bell crank designated generallyby the numeral 27, eachbell crank being supported on its own pivot 28 mounted on a suitablebracket 29 supported from the base. The long ends of the bell cranks aredesignated at 30 and the short ends at 31.

Each of the short ends has a link 32 pivotally connected thereto andeach of these links is connected to a short crank 33 lon a second drivegear 34, there being four of these gears illustrated. The gears eachhave a stub shaft 35`which forms also the gear shafts; these stub crankshafts being mounted in journals 36. y Y

The second driving gears 34 mesh with a second set of driven gears 37each having a short crank shaft 38 mounted in journals l39. These lattershafts have cranks 40 which are connected to long links 4l of the secondset of bell cranks 42. The long ends of the bell cranks are designated43 and the short ends 44. These bell cranks each have their separatepivot 45 mounted on a bracket 46wsupported from the base.

Each of the short ends of the bell cranks is connected by a short link47 to a'crank 48 of a cross shaft 49. This cross shaft is journaled inbrackets 50 mounted at the base. ItV will be seen that all four of thebell cranks 42 are connected by the short links .4T to the common shaft49. Such shaft has a single gear 51 which is the power takeoff for thedevice and may lead to any suitable driven mechanism which is not shownin the present illustrations. Y

I find it desirable to have the gears made with different sectionshaving the teeth of coarse pitch as indicated at 52 and other sectionshaving teeth of fine pitch as indicated at 53. lVhile the teeth are allkonv the same pitch circle, this action of the coarse and fine teethallows a slight amount of lost motion and prevents binding of thevarious gears through the action of the cranks being connected atquarter circles apart in the different gears. By this system of combinedhell cranks and gear connections I may transmit power from the primemover motor l2 to the nal power takeoff 51 and secure .an effectiveinterference of power with comparatively little loss through friction.

Various changes may be made in the principles of my invention withoutdeparting from the spirit thereof as set forth in the description,drawings and claims.

I claim:

1. A mechanical movement comprisingin combination a iirst drive gear anda first driven gear having` teeth of varying pitch hut meshing` on thesame pitch circle, a crank connected to the first driven gear, apivotally mounted bell crank having a long arm connected by a link tosaid crank7 the hell crank l'raving a short arm with a link and a crankdriven hy said second link with means to take ofi1 power from saidcrank.

Q. A mechanical movement comprising in combination a plurality of firstdrive gears having their axles in alinement, a plurality of firstdrivengears having their axles in alineinent-` the teeth of said gears being;of varying' pitch and meshing on the same pitch circle, a set ofpivotally mounted bell cranks having their pivots in alinement and eachhaving;- a long` and a short arm, a crank connected to cach of the firstdriven gears, each crank heine` connected by a link to the long arm ofthe bell crank, a second set of drive gears having their axles inalinement, a crank connected to each of said latter gears, a linkconnected to each lof the latter cranks and each of said latter linksbeing* connected to the short arm of the bell crank, a second drivenrear in mesh with the second drive gear, and having teeth of varyingpitch operating on the same pitch circle, and means to take ofi' powerfrom the second driven gear.

In testimony whereof I have signed my naine to this specification.

CHARLES E. NELSON.

